In this lab, several chemical tests and MP determination were performed on an unknown compound to determine the structure and the identity of the unknown. Also, an HNMR of the unknown was analyzed to confirm the identity. In the first test, unknown #36 was mixed in 2,4-DNP in a test tube. Two drops of the unknown were mixed. A yellow-orange precipitate formed, indicating the carbonyl group is not conjugated. Schiff's test was then performed where unknown #36 (1 drop) was added to the schiff's reagent (0.7 mL). A pale pink color was observed, indicating that unknown must be a ketone. The final test was the iodoform, where the unknown (1 drop) was dissolved in 1,2-dimethoxy ethane (0.5 mL), 3M NaOH (0.5 mL) and iodine solution (0.75 mL) and mixed thoroughly. A yellow precipitate formed, indicating it was a ketone.
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